Chemistry P1 and P2 today

[asma tareen]

I left out B7 .

seriously

 

[farhan141]

B7. The first of section B.

Feels better to leave out controversial questions

 

[Saad Mughal]

anwee taunt karny ke liye

Har koe aap jesa nhi hota.

 

[farhan141]

seriously

I didn't know answer of 2 parts from it so I decided to leave it.

 

[farhan141]

Answer of the last question's last part was 4200kJ right?

 

[Saad Mughal]

The mass of the tablet was o.500 grams. It contained 0.312 grams of CaCO3, according to my calculations.

It seems incorrect. But don't worry, I'll look it up in the past papers and tell you where you (or we) went wrong.
Which book do you use?

 

[Haris Sal11]

It seems incorrect. But don't worry, I'll look it up in the past papers and tell you where you (or we) went wrong.
Which book do you use?

Marshall Cavendish.

 

[Saad Mughal]

Marshall Cavendish.

Ok.

 

[Shadow]

I left out B7 .

i did half of B7, cudn't continue with it so left it on choice

 

[farhan141]

i did half of B7, cudn't continue with it so left it on choice

Lol I was gonna start B7 then I decided to read the whole question first and then left it .

I wasted 15 minutes on structure of ester and that's why I lost most of my time. I made it 6 times and crossed it out. The space was filled so I continued on a blank page. Im not sure whether I made it correct in the end. Can someone make it and show?

 

[farhan141]

It was Butyl Ethanoate.

 

[asma tareen]

Har koe aap jesa nhi hota.

acha aap to ho

 

[farhan141]

acha aap to ho

LOL

 

[Shadow]

Lol I was gonna start B7 then I decided to read the whole question first and then left it .

I wasted 15 minutes on structure of ester and that's why I lost most of my time. I made it 6 times and crossed it out. The space was filled so I continued on a blank page. Im not sure whether I made it correct in the end. Can someone make it and show?

Sure .. just remind me of the alcohol n acid

 

[farhan141]

Butyl Ethanoate

Sure .. just remind me of the alcohol n acid

 

[farhan141]

Btw isn't P2 supposed to be 2hours? It was 1h30min

 

[asma tareen]

Btw isn't P2 supposed to be 2hours? It was 1h30min

lol we arent that lucky

 

[Saad Mughal]

Btw isn't P2 supposed to be 2hours? It was 1h30min

Here's the structure.
http://www.google.com.pk/imgres?img...a=X&ei=LH-fUZrRDNOthQe4qIHgAg&ved=0CDEQ9QEwAQ

 

[asma tareen]

Here's the structure.
http://www.google.com.pk/imgres?img...a=X&ei=LH-fUZrRDNOthQe4qIHgAg&ved=0CDEQ9QEwAQ

meny to theek bnaaya

 

[A_1o1]

and u extract copper in ur blast furnace, right??

Umm...can't tell if you are being sarcastic or not....because iron is extracted in a blast furnace and I knew that slag was collected at the bottom, I was just tensed about some other questions and messed up this one too by changing it from calcium silicate to iron at the last moment..I just asked because I didn't want to look through my chemistry notes and discover what more I did wrong